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Citation: ZHU Cheng-Fei, WANG Gang, XUE Jin-Hua, OUYANG Ping-Kai. Structure and Performance of Ca, Ba Doping Sm_0.5Sr_0.5CoO₃ Cathode for Intermediate Temperature-Solid Oxide Fuel Cells[J]. Acta Physico-Chimica Sinica, ;2009, 25(11): 2211-2217. doi: 10.3866/PKU.WHXB20091132 shu

Structure and Performance of Ca, Ba Doping Sm_0.5Sr_0.5CoO₃ Cathode for Intermediate Temperature-Solid Oxide Fuel Cells

1.
College of Materials Science &Engineering, Nanjing University of Technology, Nanjing 210009, P. R. China

Received Date: 12 June 2009
Available Online: 9 October 2009

The structure and performance of SmSr1-xAexCo2O6 (x=0, 0.2, 0.4, 0.6, 0.8, 1; Ae=Ca, Ba) as intermediate temperature-solid oxide fuel cell (IT-SOFC) cathodes were investigated by X-ray diffraction (XRD), thermogravimetry (TG), thermal expansion, electrical conductivity, and electrochemical impedance spectroscopy (EIS). The SmSr1-xAexCo2O6 system's structure changes as x increases from 0 to 1. The SmSr0.8Ae0.2Co2O6 (SSAC; Ae=Ca, Sr, Ba) system has an orthorhombic structure with a Pnma space group. The crystal parameter of SSAC increases in the following order: Sr<Ca<Ba. The oxygen content increases in the following order: Ca<Sr<Ba while the electrocatalytic activity decreases. The thermal expansion coefficients of SSAC with different Ae elements are similar. The electrical conductivities of Sm0.5Sr0.5CoO3 (SSC) doped with Ba and Ca decrease because of a decrease in the carrier concentration and an increase in the conduction activation energy, respectively.
- Cathode material,
- IT-SOFC,
- SmSr1-xAexCo2O6,
- Structure,
- Performance
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沈阳化工大学材料科学与工程学院沈阳 110142

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Structure and Performance of Ca, Ba Doping Sm0.5Sr0.5CoO3 Cathode for Intermediate Temperature-Solid Oxide Fuel Cells

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通讯作者: 陈斌, bchen63@163.com

Structure and Performance of Ca, Ba Doping Sm_0.5Sr_0.5CoO₃ Cathode for Intermediate Temperature-Solid Oxide Fuel Cells